Duplex packing-ring for piston-rods.



N 664,"4-3- .Patented Dec. la, |9oo.fff o. .L G-AnLncK. l

DUPLEX 'ACKINGRING FOR PISTUN RODS.

(Application fue my s, 1900.)

I (no Model.)

' Inventor:

UNiTnD @STATES ATENT FFICE.

OLIN J. GAR-LOOK, OF PALM-YRA, NEW YORK, ASSIGNOR TO THE GARLOOK PACKING COMPANY, OF SAME PLACE.

DUPLEX PACKING-RING FOR PISTON-RODS.

SPECIFICATION forming part of Letters Patent No. 664,143, dated December 18, 1900.

Application filed July 5,1900. Serial No. 22.619. (No model.)

T LZZ whom zit muy con/cern:

Be it known that l, OLIN J. GARLooK, of Palmyra, in the county of Wayne and State of New York, have invented a new and useful Improvement in Duplex Packing-Rings for Piston-Rods, which improvement is fully set forth in the following specification and shown in the accompanying drawings.

My invention is a duplex or two-part pack- 1o4 ing-ring for piston or similar rods cut from sheets or slabs of packing material, preferably consisting of alternate layers of indiarubber and fiber, commonly used for the purpose.

l5 The invention is hereinafter fully described, and more particularly pointed out in the claims.

Referring to the drawings, Figure l is a plan of the ring. Fig. 2-isa View of the con- 2o ical side of the minor section, partly broken away. Fig. 3 is a plan showing the hollow side of the major section, a part being broken away. Fig. 4 is an edge View of the complete ring, seen as indicated by arrow 4 in Fig. l.

z5 Fig. 5 is a similar View of the ring, showing the sections as longitudinally compressed or closed together after wear. Figs. 6 and 7, respectively, show longitudinal diametrical sections of stuffing-boxes of different forms sup- 3o plied with the packing-rings, parts being broken away, the sections being as on the dotted line 6 7 in Fig. l.

A, Figs. 1 and 4, is the packiug-ring, it being a flat circular disk of packing material uniform in thickness. This ring or hollow cylindrical body is cut or divided into two circular unequal parts or sections a b (by a blade held inclined to the axis of the ring) in such manner that when divided each part or 4o section shall have one iiat side of the original ring, one section having a conical side opposite the flat side and the other section having a hollow side in the form of a conicalcavity opposite the flat-side. The dividing of the ring is done in such a manner that each section a b retains a portion of the outer or convex edge of the original ring and a portion of the inner concave side of the ring defining the central opening therein. Thus di- 5o vided when the ring is put in place in the substantial bearing-surface against the stuifing-box on the outside and against the rod on the inside. On account of this manner of dividing the ring the outer edge c of the minor or inner section b is much narrower than the corresponding edge cl of the major or -outer section a, while the inner edge e, Fig.

3, ot' said major section is much narrower than the corresponding edgef, Fig. 2, of the 6o minor section b. Preferably the ring is so divided that the narrow edges c and e are equal in width and the broad edges d and f equal in width, though this exact proportion is not essential to theinvention. In dividing 6 5 the original ring into the two sections, as stated, no material is cut away or wasted,.the ring being simply parted, so that the two sections put together constitute the original ring, with the meeting surfaces s, Fig. 3, and t, 7o Figs. 2 and 8, mutually conical or inclined,

as shown. These ring-sections are divided at one side of each by kerls g 0, the cut in each case being inclined to the fiat surface of the section, as shown. In case of the minor section b the two lines h t', Figs. l and 2, of the divide at either face of the section are tangent with opposite sides of the two inner circumferential lines of the ring, giving a flat slant 7c to t-he divided ends, as shown in Fig. 8o 2. The major section a is divided so that the two lines l fm, Fig. 3, at the opposite faces of the section are tangent to the corresponding sides of the two inner circumferential lines, said two lines l rm, terminating substantially in the same inner longitudinal line of the section, giving the slant n to the divided ends of the sections.

On account of the inward slant of the meeting surfaces s of the sections of the ring 9o the pressure of the gland or follower D of the stuffing-box B against the rings tends to cause all the vminor sections b of the assembled rings to move gradually toward the companion major sections and inward against the rod O, the reduced length of the ring after wear being shown in Fig. 5, and as the Wearing away of the packing material is Wholly at the inside next the rod the sections-b of the rings that are urged against the rod by roo the pressure of the gland are formed to have stuffing-box upon the rod each section has a l broad bearing-surfaces f to meet the rod.

The major sections a,which are intended to be crowded outward away from the rod, and consequently subjected to little wear, are given narrow bearings c against the rod, care being taken in forming these major sections only to have them reach fully across and lill the space in the stuiiing-box from the wall of the latter to the rod.

In case of a stufng-box the bottom of which is formed at, as shown at p, Fig. 6, the two-part rings are placed therein one against another, as shown, filling the annular space between said bottom surface and the opposing fiat end of the gland or follower D; but if the stucing-box be formed conical at its inner end, as shown at o, Fig. 7, a conical or minor section b of a ring is first placed at the bottom and then complete rings added, as shown, to fill the stuffing-box, a conical minor section inverted being placed next the hollow end of the gland, as shown.

Should it be found desirable in any case when dividing the minor section l) at g, as above stated, a small amount of material may be removed, as indicated by dotted lines u, Figs. l and 8, forming a narrow slit or kerf to enable said section to more readily assume a reduced diameter when pressed within the major section a, as above stated.

What I claim as my invention is- 1. A duplex packing-ring for piston-rods, comprising a major and a minor section of equal external and interior diameters, the

two sections having similar and equal crosssections, both sections having extended parallel bearings against the piston-rod and the two sections together forming a hollow cylindrical body, the sections being provided with inclined division-slits, the minor section having the two lines of its cut at either face of the section tangent with opposite sides of the two inner circumferential lines of the section to give a fiat slant to the divided ends, as shown and described.

2. The packing-ring described consisting of a major and a minor section of equal external and internal diameters, the two sections having` similar and equal cross-sections and both sections having extended parallel bearings against a piston-rod, the sections being provided with inclined slits, the minor section having the two lines of its cut at either side of the section tangent with opposite sides of the inner circumferential lines of the section and the major section having the two lines at opposite faces of the section tangent to the corresponding sides of the two inner circumferen tial lines, substantially as specified.

In witness whereof I have hereunto set my hand, this 30th day of June, 1900, in the presence of two subscribing witnesses.

OLIN J. GARLOCK.

' Witnesses:

F. W. GRIFFITH, EMMA JULIA CoRsoN. 

